PAC 750XL Skydiving Aircraft: My ride! That was the plane used by the skydivers at the Burning Man Festival. See www.burningsky.org for more info on skydiving at Burning Man.
You can find more infos about this aircraft on Wikipedia: en.wikipedia.org/wiki/PAC_750XL
Photo taken at the Burning Man 2008 festival (Black Rock Desert, Nevada).